Twister ring and traveler



RQAWA HAL 2,464,159

TWISTER RING AND TRAVELER Filed m 27. 1947 L mmvrozzs Evan 4RD RaA'r'rA AND 142. BERT ivssamfla'ux ATTORNEY Patented Mar. 8, 1949 TWISTER RING AND TRAVELER Edouard Roatta, Argues-la-Bataille, and Albert Peyssonneaux, Grenoble, France, assignors to Comptoir des Textiles Artiiiciels, Paris, France,

a corporation oi France Application May 2'1, 1947, Serial No. 750,738

- In France December 13, 1944 Section 1, Public Law 690, August 8, 1946 Patent expires December 13, 1964 This invention relates to ring twisters. More particularly, it relates to a new and improved ring twister for continuous twisting.

In continuous ring twisting frames, a ring was centered about a bobbin positioned on a rotating spindle, and a traveller formed by bending a metal wire inwardly at both of its ends to provide hooks was disposed on the ring so that it could travel thereon. Athread, after passing axially through a guide, passed under the traveller and was then wound on the rotating bobbin. If the traveller were stationary, it would act merely as a' guide and the thread would wind up on the bobbin without undergoing any twist. If the traveller had the same angular speed as the bobbin, the thread would be twisted but would not be wound on the bobbin. Owing to the slight friction of the traveller on the ring, the angular speed of the traveller was lower tl'lan that of the bobbin, with the consequence 'that the yarn was twisted as it was Wound on the bobbin. In order to insure winding of the thread over the entire length of the bobbin, the ring was reciprocated in a vertical direction.

The above described ring twister has undergone only slight alteration. ,In general, the improvements consisted mainly in the form and shape of the ring and traveller. Generally, the traveller was disposed in a vertical plane inside of the ring, and attempts have been made todisposed the ring astride (in a horizontal plane) on the ring.

The above described ring twisters, though satisiactory for cotton and wool, were not satisfactory for use with artificial threads. In the twisting of synthetic yarns, such as rayon, it is essential that the thread be lubricated or dressed in order to impart flexibility and slip characteristics thereto. The dressing composition generally comprised a fatty compound which adhered to both the ring and traveller and was transferred into black coom under the eii'ect of the small metal particles resulting from the abrasive action of the metal. Through projection, such coom stained the windings or cop." Such defect was still further accentuated due to the lubrication of the ring itself. When the thread broke, the cop had a tendency to increase in'size (expand) and the accumulation of the thread resulting therefrom resulted in an intense sweeping of the ring and traveller, with the result that the coom was projected on and stained the adjacent cops. Further, the expanded cop itself was stained. The stained cops were either rejected or the stained windings were removed, producing waste. Thus,

3 Claims. (Cl. 57-1 21) iii) in general, the defects of the prior art ring twisters were the rejection of the cops due to staining and the waste resulting from removal of the stained yarn.

An object of this invention is to provide a new and improved ring twister. f

Another object of this invention is to provide a ring twister for rayon having means for preventing staining of the thread.

Other and additional objects will become apparent hereinafter.

The objects of the invention are accomplished, in general, by securing the ring on which the traveller rides to the outside of a cylindrical shield centered and disposed in spaced relationship about a bobbin, whereby the lubricant or dressing of the yarn is inhibited from being projected onto the windings and, in the event the thread breaks and the cop expands, the thread will engage a clean surface. Means are also provided for the lubrication of the ring, and the shield is so constructed that it will receive any drippings and prevent them from being projected onto the thread.

The nature and objects of the invention will become apparent from the following detailed description when taken in connection with the accompanying drawings, wherein:

Figure 1 is a side elevation, partly in section, of one position of a ring twister frame embodying the features of the invention;

Figure 2 is a plan view of the ring and shield:

Figure 3 is a section taken on the line 3-3 of Figure 4; and

- Figure 4 is an enlarged fragmentar detailed section of the shield, ring and traveller.

Referring to the drawings, wherein like reference numerals designate like parts, the reference numeral I designates a spindle provided with a pulley 2 whereby the spindle is rotated by a belt (not shown). The spindle I is provided with the usual support on which a bobbin 3 is disposed.

The reference numeral 1 designates a ring carrier formed of an aluminum or aluminum alloy cylinder which constitutes a shield and which, as shown in Figure 1, is centered about 1 and disposed in spaced relationship to the bobbin.

instead of on the ring. The boss 9 spaces the ring 8 from the ring carrier 1, forming a gutter l and annular space l0 and is provided with small vertically extending holes ll for-reasons which will become apparent; The ring carrier 1 is provided with a shoulde 12 which is designed to engage the ring rail of the frame (not shown). The shoulder I 2 is provided with a drip groove i3. At the-bottom, the ring carrier 1 is provided with a flange having a drip groove It for receiving the lubricating oil which is introduced in small quantities in the gutter Hi and which oozes through the holes I! and along the outside wall of the ring carrier.

The ring 8 is formed of hardened steel and is adapted to be traversed by a traveller, generally indicated by the reference numeral 5. The traveller i5 is formed of a metal wire which, in side elevation, has the shape of a C, the branches i6 and i1 thereof being hooked on the ring 8.

The free terminal of the upper branch la is preferably bent into substantially U-shape, as indicated by the reference numeral l8, and the lower branch I! terminates in a loop I9. It is to be noted that, as shown in Figured, the U l8 and the loop l9 are on opposite sides relative to the vertical member of the traveller l5. When the traveller i5 is in position on the ring 8, the upper branch i6 is disposed in the gutter ill and the lower branch ll is disposed in the annular space I0.

As is shown in Figure 4, the construction of the traveller'is such that it rests on the ring 8 along a curved surface of small extent and constant form, offering a minimum of resistance to friction.

Due to the form of the traveller, the thread can be easily threaded therethrough. When the ring twister is at rest in inoperative position, the traveller i5 hangs down by its weight and is suspended by the upper branch l5 on the ring 8 whereby the lower branch I1 is opened, 1. e.. spaced from the ring 8 and through which the thread is introduced.

In operation, the thread A, which is fed through a guide 6 positioned axially of the bobbin, passes beneath the upper branch l6, and pulls the traveller whereby the traveller is inclined so that it engages the ring at only two points, as shown in Figure 4, and reduces friction to a minimum. It is to be noted that during operation, the thread A does not engage the top edge of the shield, If desired, the top edge of the shield can be made slightly lower than the top edge of the ring.

Though the invention has been described in connection with the traveller being disposed in a vertical plane on the ring, the invention is not restricted thereto.

Since it is obvious that various changes and modifications may be made in the above description without departing from the nature or spirit thereof, this invention is not restricted thereto except as set forth in the appended claims.

We claim:

r 1. A ring twister comprising a cylindrical shield adapted to be centered about and disposed in spaced relationship about a bobbin on which the twisted yarn is wound, a ring secured to the outside oi said shield, a boss spacing said ring from said shield and providing a gutter, said boss having small holes extending vertically therethrough, means to receive drippings from the outside of said shield, and a traveller slidably disposed on said ring.

2. A ring twister comprising in combination, a ring with a cylindrical interior shield adapted to be centered about and disposed in spaced relationship about a bobbin on which the twisted yarn is wound, an annulus spacing said ring from said shield and providing a channel at the top for grease or oil and an annular chamber at the bottom, a vertical traveller slidably disposed on the outside of said ring and having ends extending into said channel and said chamber respectively, said annulus having small substantially vertical apertures extending between said channel and said chamber for the passage of oil or grease to said chamber in a position tobe picked up and distributed by the ends of said traveller for lubricating the contacting surfaces.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Rigby Aug. 10, 1877 Dover Apr. 26, 1921 FOREIGN PATENTS Country Date Great Britain Aug. 12, 1885 Germany Aug. 15, 1933 Number Number 9,583 582,233 

